package com.zhuojy.equity.mall.admin.web.security.component;

import java.util.Collection;

import cn.hutool.core.collection.CollUtil;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

/**
 * 动态权限决策管理器，用于判断用户是否有访问权限
 */
@Component
public class DynamicAccessDecisionManager implements AccessDecisionManager {

	@Override
	public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		// 当接口未被配置资源时直接放行
		if (CollUtil.isEmpty(configAttributes)) {
			return;
		}
		for (ConfigAttribute configAttribute : configAttributes) {
			//将访问所需资源或用户拥有资源进行比对
			String needAuthority = configAttribute.getAttribute();
			for (GrantedAuthority grantedAuthority : authentication.getAuthorities()) {
				if (needAuthority.trim().equals(grantedAuthority.getAuthority())) {
					return;
				}
			}
		}
		throw new AccessDeniedException("抱歉，您没有访问权限");
	}

	@Override
	public boolean supports(ConfigAttribute configAttribute) {
		return true;
	}

	@Override
	public boolean supports(Class<?> aClass) {
		return true;
	}

}
